Buried Pipeline Cathodic Protection Testing Survey Using CIPS DCVG Methods

The CIPS/DCVG buried pipeline cathodic protection detection system integrates the densely spaced pipe ground potential detector (CIPS) and the direct current potential gradient detector (DCVG), and is used to directly detect the double protection effect of the buried pipeline anti-corrosion layer and cathodic protection Evaluated equipment. The CIPS densely spaced pipe ground potential detector evaluates the protection effect of the cathodic protection system by detecting the on-off potential of the cathodic protection of the pipeline. The situation, the flow direction of the corrosion current of the damaged pipe body is detected, and the integrity of the pipeline anti-corrosion layer is evaluated. Cathodic protection effect detection and evaluation can determine the distribution of stray current, evaluate its impact on pipeline external corrosion, quantitatively analyze and classify the damage degree of defect points, determine the priority of repair of defect points, and provide pipeline owners with reasonable and scientific Maintenance and repair management plan.

1. Integrating CIPS+DCVG, it can not only evaluate the cathodic protection effect of the pipeline, but also evaluate the integrity of the anti-corrosion layer;
2. The instantaneous on-off potential of pipeline cathodic protection system can be accurately measured by using GPS clock signal synchronization;
3. The geographical location information, date information and time information of the pipeline can be measured by GPS, and the pipeline direction map can be generated;
4. The display screen displays measurement information such as ON/OFF potential and GPS status;
5. Automatically save the measurement data, display the measurement results in real time and display their waveform diagrams, and the detection results are more intuitive;
6. The data analysis software automatically generates relevant graphics and reports, analyzes the weak position of the cathodic protection of the pipeline, and provides data support for the treatment plan of the cathodic protection system of the pipeline;
7. The data analysis software can analyze the size and position characteristics of the pipeline stray current interference;
8. The data analysis software can realize the calculation of IR% of the severity of the damage point of the anti-corrosion layer;
9. The distance meter can accurately measure the length of the measured pipeline;
10. The DCVG analog pointer table visually indicates the position, size and current direction of the damaged point of the anti-corrosion layer;
11. The circuit breaker is compatible with all similar products on the market and has a straight-through function, which can be connected to the cathodic protection system for a long time;
12. It is possible to determine the approximate position of the damage of the anti-corrosion layer of the large-diameter pipeline in the circumferential direction of the pipeline, and determine the approximate shape of the damage of the anti-corrosion layer;
13. Be able to determine the existing DC stray current interference, and the current inflow/outpoint of the damaged part;
14. It can detect pipelines with various material anticorrosion layers, such as asphalt anticorrosion, 3-layer PE anticorrosion, etc.

1. CIPS range: automatic range, 10 mV, 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1.0V, 2.5 V, 5.0V, 10.0V, 25.0V;
2. DCVG range: automatic range, 10 mV, 25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1V, 2.5 V, 5V, 10V, 25V;
3. The positioning accuracy of the damaged part of the anti-corrosion layer: ≤15cm
4. Detection depth: ≤5m
5. Leak detection accuracy: ≥0.25mm2 damage defect;
6. Working voltage: 8.4V 5AH;
7. Screen display: 320*320 LCD large screen display;
8. Working hours: >24 hours;
9. Working language: Chinese and English can be set;
10. Interface display: real-time data, real-time waveform;
11. Memory: 6GB, can store 1 million sets of data;
12. Internal clock: separate lithium battery, work alone;
13. Matching: Compatible with similar foreign products for circuit breakers;
14. Input impedance: 100MΩ;
15. Storage time: continuous data storage > 24 hours;
16. Power supply: built-in lithium battery pack 8.4V 5AH;
17. Working environment: -10°C-40°C, relative humidity <80%RH;
18. Storage environment: -20°C-60°C, relative humidity <90%RH;
19. Host volume: 245*150*48mm
20. Host weight (including battery): 1.0Kg

1. Output voltage: maximum 80V;
2. Output current: maximum 80A;
3. Power supply: built-in lithium battery;
4. Working hours ≥ 48 hours.
5. Working mode:

CIPS/DCVG data analysis software is used to upload the data collected on site to the computer and perform relevant calculation and analysis. The software has the following functions:

1. Download the saved data in the instrument through the USB port;
2. Import and export data files in various formats (Eecel, Word, Pdf)
3. Automatically generate distance-potential (ON, OFF) curves;
4. Automatically generate DCVG potential gradient graph;
5. Calculation of the damage point severity (%IR) of the anti-corrosion layer;
6. Automatically generate the pipeline trend diagram and view the on-off potential of each measurement point.